The document outlines 7 key skills that a ReactJS developer should possess: 1) Extensive knowledge of HTML and CSS beyond basics. 2) Proficiency in JSX which is the syntax extension of ReactJS. 3) Strong foundation in JavaScript fundamentals and ES6 features such as variables, array methods. 4) Familiarity with version control tools like Git for collaboration and code management. 5) Experience with Redux for state management in React applications. 6) Understanding of Node.js and NPM for building the backend. 7) Skilled in additional tools and technologies that support React development like Jest, Enzyme, Sentry, etc.

1. TOP 7
SKILLS TO
LOOK INTO
REACTJS
DEVELOPER
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2. When you are planning to
develop a JavaScript-based
application, hiring a skilled
developer can ease your job.
Alongside the choice of the
framework supporting the
development of JavaScript
applications is also
significant. As it
appears, ReactJS is one of
the most widely used
frameworks enabling
software developers to build
engaging applications.
ReactJS is a perfect fit to
build dynamic user interfaces
that simplify your business.

3. “Though some believe
ReactJS to be the
replica of front-end
development
frameworks, in reality,
it is the library of user
interfaces leading to
the creation of eye-
catching and feature-
rich applications.”

4. Additionally, the presence of
virtual DOM enhances the
performance of complicated apps
as modifications can be done
without actually affecting the
other components in the
hierarchy. The strong community
support and the presence of
inbuilt tools further upscale the
app scalability.
Without a doubt, ReactJS is an
excellent choice for developing
JavaScript-based applications.
However, as mentioned earlier,
both the developer and the
development framework hold the
responsibility of developing
high-end, scalable applications.

5. True that the application
development framework
eases the task of
development, but to ensure
that the framework is
utilized to its total
potential, you would need
an excellent developer, let
alone a skilled or an expert.
In case you are planning to
hire a react JS developer for
your business, ensure that
the ideal candidate
possesses the needed skills.

6. Skill 1 HTML/CSS
React JS is kind of a front-end
development framework. If it is so,
what would be a developer without
knowing HTML and CSS? The app
interface is one of the fascinating
things that attract users and lure
them into engaging with the same.
Irrespective of the type of business or
the application you are about to
build, every ReactJS developer must
possess extensive knowledge in fields
of HTML and CSS. And when we say
extensive knowledge, we emphasize
on beyond basic information.
For instance, the ability to work on
CSS selectors or the semantic HTML
tags are few of the must-haves in a
developer. The understandability of
border-box, flexbox are a plus.
Top 7 Skills to
look into React
JS Developer

7. Skill 2 JSX
Similar to HTML, JSX is the
extension of the ReactJS
environment and as also a
fascinating part of React. When
working with react JS, hardly
would a developer delve deep
into HTML. Instead, much of the
interaction is via JSx, the syntax
extension of ReactJS.
In technical terms, JSx is the
React.createElement() API
abstraction layer. What turns JSx
to be an important part of the
development is the fact that it
allows developers to create
applications using the above API,
which otherwise would be a
gruesome task.

8. Skill 3 JavaScript
Fundamentals + ES6
Yet another skill to seek within
your potential candidates is the
knowledge of hands-on
experience in JavaScript
Fundamentals + ES6. Only when
a developer has sound
knowledge of both, can he/she
make the most out of the
framework. And it isn’t just the
JavaScript fundamentals that
count as a skill but the fusion
with eS6 that makes a
developer adept in web
application development. Top
ES6 skills include:.

9. Variables & Scoping
A common trend of storing
variables is to use the ‘var’
keyword, right? With ES6, a
developer can take a step
forward and choose from a range
of keywords such as `let` and
`const.` This creates an
impression that developers can
avoid using var when not
needed.
Array Methods
Storing and accessing data is a
tough nut to crack. Even if you
have had the ease to store data
in arrays, retrieving and
manipulating them is a bit
difficult. Thanks to the bundle of
tools offered by JavaScript as
`.map`, `.filter` and `.reduce` to
play with array methods.

10. Skill 4 Git
Every developer must be
acquainted with the Git
toolkit. It gives them the
flexibility to add or update
projects on different coding
forums such as the GitHub,
Gitlab, and the BitBucket.
Some of the commonly
executed tasks comprise
merging strategies and
handling conflicts, using
push and pull to interrogate
changes, etc.

11. Skill 5 Redux
The state management library of
React, Redux is another essential
feature or skill that every
developer must-have. Earlier
developers have had a hard time
dealing with the asynchronous
nature of React updates.
To help with this, react came
with this hot button feature,
namely redux. It is much like the
principles of immutability and
functional programming.
However, do not get mistaken by
considering it to be one solution
that fits all. The applicability of
the same depends upon the state
and hence, your developer must
excel in it.

12. Skill 6 Node + NPM
Lastly, the knowledge of the
node. Ok, you might find
this a little vague, but trust
me, a developer that has
decent knowledge of node
can effectively exhibit the
development needs of the
client-side. There are
specific packages in the
node that can be extended
to the react library; hence
the knowledge of the former
adds more to the
development process.

13. Skill 7 Should be
Skilled at Tools and
Technologies
Sentry for real-time monitoring and
fix crashes
Bitrise – Increased automation
Hockeyapp – Crash reporting,
managing testers, beta distribution
Redux – Manage the application state
ESLint – To validate the code in
compliance with JavaScript patterns
Jest – Ready-to-use tool for testing
JS code
Enzyme – Facilitate the testing of
React apps
In addition to the above, it is
expected that the developer is well
versed in the NPM registry, a place
that hosts software that facilitates
the development of another software
solution.

14. The Final Word
Well, hiring a developer
could be a stressful
experience, but when you
know what you are looking
at, things turn easier. So,
the next time you hire
ReactJS developer, make
sure you are considering all
the skills stated above. At
Bacancy Technology, we
always make a special
emphasis on the
foundations of each project
and we have incorporated
all the versions of ReactJS
from 0.3.0 to 16.6.3 as our
mainstream front-end
technology.